<?php
/*******************************************************************************

    FinalsClub.org is a platform for students and faculty to collaborate
    and share their knowledge with the world.

    Copyright (C) 2009  Andrew Magliozzi
 
    This file is a part of FinalsClub.org.

    FinalsClub.org is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
    To contact FinalsClub.org, send an email to info@finalsclub.org, or
    send mail to Finals Club, c/o Veritas Tutors, 1132 Massachusetts Avenue,
    Cambridge, MA 02138.

*******************************************************************************/

function pager_navigation($pager, $uri) {
  $navigation = '';
 
  if ($pager->haveToPaginate())
  { 
    $uri .= (preg_match('/\?/', $uri) ? '&' : '?').'page=';
 
    // First and previous page
    if ($pager->getPage() != 1)
    {
      $navigation .= link_to(image_tag('first.png', 'class="pngimg" align=absmiddle'), $uri.'1');
      $navigation .= link_to(image_tag('previous.png', 'class="pngimg" align=absmiddle'), $uri.$pager->getPreviousPage()).'&nbsp;';
    }
 
    // Pages one by one
    $links = array();
    foreach ($pager->getLinks() as $page)
    {
      $links[] = link_to_unless($page == $pager->getPage(), $page, $uri.$page, 
      	$page == $pager->getPage()? 'class="activePage"' : '');
    }
    $navigation .= join('&nbsp;&nbsp;', $links);
 
    // Next and last page
    if ($pager->getPage() != $pager->getCurrentMaxLink())
    {
      $navigation .= '&nbsp;'.link_to(image_tag('next.png', 'class="pngimg" align=absmiddle'), $uri.$pager->getNextPage());
      $navigation .= link_to(image_tag('last.png', 'class="pngimg" align=absmiddle'), $uri.$pager->getLastPage());
    }
 
  }
 
  return $navigation;
}
